Title:
BAG MAKING METHOD AND BAG MAKING MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/180986
Kind Code:
A1
Abstract:
Two web-shaped body materials and gusset materials are used as constituent elements of a bag. These are formed from a single material. This bag making method comprises: heat sealing alternately-stacked body materials and gusset materials with every intermittent conveyance while the materials are sandwiched by heat sealing members; after the heat sealing by the heat sealing members, sequentially manufacturing bags by cross-cutting the body materials and the gusset materials in the width direction of the body materials with every intermittent conveyance of the body materials. The bag making method further comprises, during the heat sealing, blocking a first surface and a second surface which face each other from being heat sealed to each other at one constituent element by means of a release agent interposed between the first surface and the second surface. The release agent is coated on a film constituting the one constituent element in advance. The first surface and the second surface are surfaces serving as the outside of the bag.
Inventors:
TOTANI MIKIO (JP)
Application Number:
PCT/JP2021/045522
Publication Date:
September 01, 2022
Filing Date:
December 10, 2021
Export Citation:
Assignee:
TOTANI CORP (JP)
International Classes:
B31B70/64; B31B70/10; B31B160/20
Domestic Patent References:
| WO2018012542A1 | 2018-01-18 |
Foreign References:
| JPH01101144A | 1989-04-19 | |||
| JP2009179357A | 2009-08-13 | |||
| JPS3811393B1 | 1963-07-05 | |||
| JPS4830592B1 | 1973-09-21 | |||
| JPH10264942A | 1998-10-06 |
Attorney, Agent or Firm:
MINORI PATENT PROFESSION CORPORATION (JP)
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